Do you remember the spacecraft Stardust that went out to collect particles in collector made of aerogel. Anyway these aerogel plates where almost safetly returned to the Earth and now the search to find out what particles are inside them starts. The idea with this is like the SETI@home program. People run it on their spare processor time and eventually return results to the scientists who figure out what to do with them. If you are interested I would suggest you go and take a look at []

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